Flotation separation technology for high-sulfur lead-zinc ore in high-concentration environment

Abstract

The invention discloses a flotation separation technology for high-sulfur lead-zinc ore in a high-concentration environment. The flotation separation technology aims at high-sulfur lead-zinc sulfide ore containing associated gold and silver, and flotation of lead and associated gold and silver minerals is preferentially carried out in a high-concentration and neutral natural pH flotation environment; and lead-flotation tailings are subjected to two-stage rough flotation so as to realize bulk flotation of zinc-sulfur minerals, the pH value and the potential of ore pulp are regulated and controlled by adopting lime in the zinc-sulfur separation flotation process so as to realize zinc-sulfur separation, and a small amount of activating agents and collecting agents are added to strengthen flotation of zinc minerals difficult to float. According to the flotation separation technology, the defects that in the lead flotation process of high-alkali mediums, the recovery rate of lead, gold andsilver is low, the usage amount of agents is large, the floatation process is not stable, and the like can be overcome; and meanwhile, a zinc-sulfur mineral inhibitor XKK012 and a lead-gold-silver collecting and frothing agent XKY712 are invented, so that the problems that the lead-zinc-sulfur separation efficiency is low, the separation precision is poor, and the hydrophobic capacity of part of lead-gold-silver minerals is weak can be solved, and the technology has the advantages of being energy-saving, environment-friendly, non-toxic, harmless, low in beneficiation cost, high in recovery efficiency and suitable for comprehensive recovery of valuable metal minerals in the high-sulfur silver-lead-zinc-contained ore.

Description

technical field [0001] The invention relates to the technical field of non-ferrous metal ore flotation, in particular to a beneficiation process for recovering valuable metal minerals in high-sulfur lead-zinc ore. Background technique [0002] The presence of precious metal gold and silver minerals is often associated with lead-zinc polymetallic sulfide ores, in which lead, zinc, and sulfur mainly exist in the form of galena, (iron) sphalerite, and (magnetic) pyrite, and the gold minerals are in the form of galena Ore-wrapped gold, pyrite-wrapped gold and a small amount of natural gold exist, and silver minerals mainly exist in the form of silver sulfide and natural silver. The valuable metal minerals that can be comprehensively recovered in the ore include lead, zinc, sulfur and associated gold and silver. The gold and silver minerals are mainly enriched in the lead concentrate for comprehensive recovery. In the sorting process of this kind of ore, there are generally prob...

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Problems solved by technology

[0004] The technical problem to be solved in the present invention is that for high-sulfur lead-zinc sulfide ores containing associated gold and silver, it is difficult to select by traditional mineral processing technology, the separation efficiency is low, the comprehensive index of mineral processing is poor, the recovery rate of associated gold and silver is low, and the cost and cost of mineral processing are low. To solve the problems of high energy consumption and unstable flotation process, provide a high-efficiency, stable, energy-saving, environmentally friendly, high-separation efficiency, strong adaptability, and high-concentration flotation environment to recover high-sulfur lead-zinc ore. The beneficiation process of valuable metal minerals enables efficient and comprehensive recycling of valuable metal resources in such lead-zinc sulfide ores

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